Thomas Reiter arrives at KSC - he will participate in the Terminal Countdown Demonstration Test with the STS-121 crew

ESA astronaut Thomas Reiter shortly after arrival at NASA's Kennedy Space Center, in Florida, the United States, ahead of the Terminal Countdown Demonstration Test (TCDT). Reiter and the rest of the STS-121 crew arrived in a NASA Gulfstream G-2 aircraft. The TCDT is held before each Space Shuttle flight and provides the crew with an opportunity to participate in safety training and simulated countdown activities.